Biomechanical, psychophysical, and physiological evaluations of using two-wheel carts in experienced workers based on a soft drink beverage delivery company /
through static biomechanical, psychophysical, and physiological measures with nine male beverage delivery workers. These experienced workers have used two-wheel carts an average of five years. For the capable loads and acceptable forces, the task of pulling the cart over a curb differed from the oth...
| Main Author: | |
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=733050321&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | through static biomechanical, psychophysical, and physiological measures with nine male beverage delivery workers. These experienced workers have used two-wheel carts an average of five years. For the capable loads and acceptable forces, the task of pulling the cart over a curb differed from the other tasks: push, pull and tilt-back. With the maximum applied hand forces, the force produced by the powered stair climber was the lowest while the taller no runner 10-inch wheel cart created the largest force even though it weighed the least. The factors of activity and distance had significant effects on the work load of simulated working conditions measured by the differential heart rates. The pull tasks were always produced higher differential heart rates than the push tasks except for one combination - short distance with light load. There was no significant different between pull and push tasks for the light load. Comparing the two working postures, the asymmetric posture created more compression and sagittal and frontal shear forces on the L5/S1 disc than the symmetric posture. The five the L5/S1 disc than the symmetric posture. The five recommended weight limit in the asymmetric posture. The powered stair climber created the lowest force on NIOSH limit for both symmetric and asymmetric posture. The cart type had significant effects on forces at the initial stage of the task at the curb and stairs and initial stage of the task at the curb and stairs and the stairs. At the floor, no significant differences of forces were detected among the carts. For the curb and stair, the powered stair climber (the heaviest cart) required very low forces while the guide runner cart) required very low forces while the guide runner climber, sliding mechanism cart, and guide runner 8-inch wheel cart had low differential heart rate values while the six-6-inch wheel cart showed the largest value followed by the guide runner 10-inch wheel cart. |
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| Item Description: | Vita. "Major Subject: Interdisciplinary Engineering". |
| Physical Description: | xvi, 146 leavess : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 115-121). |